New Lanthanide Hybrid as Clustered Infinite Nanotunnel with 3D Ln−O−Ln Framework and (3,4)-Connected Net

Abstract

A series of new lanthanide hybrids [Ln3(mu-OH)4 (2,5-pydc)(2,5-Hpydc)3(H2O)4]n (Ln = Gd (1), Dy (2), Er (3), Eu (4), Sm (5), Yb (6), Y (7); 2,5-pydc=pyridine-2,5-dicarboxylate), as clustered lanthanide oxide ring tunnels with helical dodecahedral chains and fully 3D Ln-O-Ln connectivity, has been hydrothermally synthesized and characterized. The inorganic skeleton of the hybrid can be specified by the Schläfli symbol (6210)2 (64102) as a single 3D (3,4)-connected net. The luminescence properties have been studied, and the results showed that the Dy(III) (2) and Eu(III) (4) complexes exhibited sensitized luminescence in the visible region. Variable-temperature magnetic susceptibility measurements of 1-6 showed that the complexes 1-3 are nearly paramagnets, whereas the depopulation of the Stark levels in complexes 4-6 leads to a continuous decrease in mu(eff) when the sample is cooled from 300 to 2 K.

Crystal structure of diaquabis(3-hydroxyquinoxaline-2-carboxylato- κ2N1,O)copper(II) dihydrate, Cu(C9H5N2O3)2(H2O)2 · 2H2O

“…Construction of metal-organic frameworks (MOFs) through well-chosen metals and multifunctional ligands is one of the current topics owing to the intriguing structural diversity and potential applications in microporous, magnetic, non-linear optical andf luorescent materials [1][2][3][4]. Aromatic carboxylate ligands, and especially N-heterocyclic carboxylates, are popular candidatesfor preparing novelMOFsbecause of theirversatilecoordinationmodes [5][6][7].…”

A series of three-dimensional 3d–4f heterometallic coordination frameworks based on pyridinedicarboxylic acid

“…Excitation at 280 nm reveals the characteristic transition of 5 D 0 ? 7 F J (J = 0-4) of Eu 3? ions [20,21]. The symmetry-forbidden emission 5 D 0 ?…”

Synthesis and characterization of two dimensional metal organic framework of cerium with tetraaza macrocyclic

“…Lanthanides complexes of MOFs are less common compare to their d-bock transition metals due to high coordination number and flexibility of coordination sphere which makes the designation difficult [6,4]. Some lanthanides MOFs have been successfully synthesized in the past few years mainly with Tb, Ho, Er, Yb and Y [8,12]. The MOFs are usually synthesized using hydrothermal method at elevated temperature and may take longer time.…”